Plaintiffs 1 and 2 are the son and daughter and the third plaintiff is the widow of late Dr. J. Dhairyam, a retired Superintendent of the Government Mental Hospital. The defendant Dr. G. D. Dhairyam is another son of late Dr. Dhairyam. Deceased Dhairyam, according to the plaintiffs, had opened a Mental Clinic and Nursing Home after his retirement at No. 16/3, Sterling Road, Nungambakkam, which, the plaintiffs claim, attained in due course great popularity and attracted patients even from foreign countries. The third plaintiff assisted her husband in running the Nursing Home and Clinic and attended to the needs of the patients. The late Dr. Dhairyam got the defendant trained in Psychiatry and two other children, Antony Shamraj and Shanti Mrinalini, qualified in medicine with the desire that they should assist him in running the clinic. But the late Dr. Dhairyam died on 30th September, 1956, leaving behind, his widow the third plaintiff, four sons and two daughters of whom one of the sons, Christy Amrithraj died in 1963 and another, Antony Shamraj is in England. The plaintiffs say that subsequent to the death of their father Christy Amrithraj and Joseph Kantharaj (first pl